Try not to sound like a salesperson on the call. Be human and show emotion. While this is a professional call, be friendly and confident in your tone, without sounding desperate or nagging.
Being pleasant and using a friendly tone of voice can help ease the conversation and using a sense of humour can help make the person at the other end of the phone more comfortable. These executives are busy all day and speak to several kinds of people, so ensure to stand out with your conversation and be the one they remember!